Finding the Fourth Proportional to 12,141.27, 18,198.94 and 8,667.99

Step by Step Solution

1. Step 1: Write the proportion equation
   12,141.27 : 18,198.94 = 8,667.99 : x
2. Step 2: Convert to fraction form
   12,141.27/18,198.94 = 8,667.99/x
3. Step 3: Cross multiply
   12,141.27x = 18,198.94 × 8,667.99
4. Step 4: Simplify right side
   12,141.27x = 157,748,229.93
5. Step 5: Solve for x
   x = 157,748,229.93/12,141.27
6. Step 6: Final answer
   x = 12,992.73